Dog toothbrush



FIG. 1 is a Perspective view of a dog toothbrush showing my new design;

FIG. 2 is a Front view of the dog toothbrush as shown in FIG. 1;

FIG. 3 is a back view of the dog toothbrush as shown in FIG. 1;

FIG. 4 is a top-side view of the dog toothbrush as shown in FIG. 1;

FIG. 5 is a bottom-side view of the dog toothbrush as shown in FIG. 1;

FIG. 6 is a left-side view of the dog toothbrush as shown in FIG. 1; and,

FIG. 7 is a right-side view of the dog toothbrush as shown in FIG. 1. 

CLAIM I claim the ornamental design for a dog toothbrush, as shown and described. 